High accuracy Location Estimation of a Mobile Tag using One-way UWB Signalling

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Title: High accuracy Location Estimation of a Mobile Tag using One-way UWB Signalling
Authors: Saad, Mohamed M.
Bleakley, Chris J.
Walsh, Michael
Ye, Tingcong
Permanent link: http://hdl.handle.net/10197/3969
Date: 3-Oct-2012
Abstract: This paper presents a novel algorithm for determining the 3D location of a Mobile Tag (MT) using wireless Base Stations (BSs) and Ultra Wide Band (UWB) one-way signaling. The algorithm is designed for low power, rapid deployment applications in which the BSs are independent, wireless UWB transceivers located at known positions and the tags are receiveonly or transmit-only UWB mobile units. The algorithm utilizes multi-BS time synchronization and hybrid Time Difference of Arrival-Time of Flight (TDoA-ToF) localization to achieve high accuracy tag localization. The algorithm consists of two concurrent tasks. In task I, the BSs exploit periodic inter-BS transmissions to obtain high accuracy multi-BS time synchronization. In task II, a hybrid TDOA-TOF algorithm is used to determine the location of the MT. The algorithm is based on timestamping, or control, of packet Time of Emission (ToE) and estimation of the packet Time of Arrival (ToA). As such, the method is appropriate for use with, but not limited to, IEEE 802.15.4a UWB. In simulations assuming a typical 2 cm standard deviation in ToA estimation error the proposed algorithm was found to provide a RMS error of 2.1 ps and 4.8 ∗ 10−6 ppm for time offset and crystal clock offset between BSs respectively; and a RMS error in MT location estimation of 2.2 cm; which is 36% better accuracy than the conventional TDoA method.
Funding Details: Higher Education Authority
Type of material: Conference Publication
Publisher: IEEE
Copyright (published version): 2012 IEEE
Keywords: UWB localizationTDOA,TOFAlgorithmsTime synchronization
Subject LCSH: Ultra-wideband devices
Time measurements
DOI: 10.1109/UPINLBS.2012.6409769
Language: en
Status of Item: Peer reviewed
Is part of: Ubiquitous Positioning, Indoor Navigation, and Location Based Service (UPINLBS), 2012 [proceedings]
Conference Details: Ubiquitous Positioning Indoor Navigation and Location Based Service (UPINLBS), Helsinki, Finland, October, 2012
ISBN: 978-1-4673-1908-9
Appears in Collections:Computer Science Research Collection

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